Import frozen tracks bug

I import some tracks from a project (into my current one). For whatever reason, it says it can access the frozen audio, and will unfreeze the tracks. OK I don’t mind.
But now if I want to move (all) the content from tracks to a different time position, the ones that were unfrozen are now stuck at the same place. I have to freeze / unfreeze them to solve this.

Side note : I hope that freeze function will be improved, and allow us to deal with tempo change, or to move the containers to a different position, for instance